| two-carbon fragment | The acetyl group (CH3CO-) that takes part in transacetylation reactions with coenzyme A as carrier; commonly referred to as acetate or acetic acid, from which it is derived. (05 Mar 2000) |
|---|---|
| two-cleft | <botany> Divided about half way from the border to the base into two segments; bifid. Source: Websters Dictionary (01 Mar 1998) |
| two-component plasma | <radiobiology> Refers to a plasma containing a cool thermal component and a population of high energy particles (such as from neutral beam injection) which are in the process of thermalising (slowing down). (09 Oct 1997) |
| two-dimensional chromatography | Paper chromatography in which a spot, located originally in one corner of a sheet, is developed in one direction along one side of the sheet, after which the sheet is rotated 90 |
| two-glass test | The urine, in a case of gonorrhoea, is passed into two glasses; if the gonococci and gonorrhoeal threads are found only in the first glass the probability is that the process is limited to the anterior urethra. Synonym: two-glass test. (05 Mar 2000) |
| two-hand | Employing two hangs; as, the two-hand alphabet. See Dactylology. Source: Websters Dictionary (01 Mar 1998) |
| two-handed | 1. Having two hands; often used as an epithet equivalent to large, stout, strong, or powerful. "Two-handed sway." 2. Used with both hands; as, a two-nanded sword. "That two-handed engine [the sword]" (Milton) 3. Using either hand equally well; ambidextrous. Source: Websters Dictionary (01 Mar 1998) |
| two-lipped | 1. Having two lips. 2. <botany> Divided in such a manner as to resemble the two lips when the mouth is more or less open; bilabiate. Source: Websters Dictionary (01 Mar 1998) |
| two-parted | <biology> Divided from the border to the base into two distinct parts; bipartite. <botany> Divided from the border to the base into two distinct parts; bipartite. Source: Websters Dictionary (01 Mar 1998) |
| two-ranked | <botany> Alternately disposed on exactly opposite sides of the stem so as to from two ranks; distichous. Source: Websters Dictionary (01 Mar 1998) |
| two-sided | 1. Having two sides only; hence, double-faced; hypocritical. 2. <biology> Symmetrical. Source: Websters Dictionary (01 Mar 1998) |
| two-step exercise test | A test used mainly for coronary insufficiency; significant depression of RS-T in the electrocardiogram is considered abnormal and suggests coronary insufficiency. (05 Mar 2000) |
| two-step procedure | <surgery> When surgical biopsy and breast surgery are performed in two separate surgeries. (09 Oct 1997) |
| two-stream amplifier | <radiobiology> Microwave amplifier based on the two-stream instability. (09 Oct 1997) |
| two-stream instability | <radiobiology> Instability which can develop when a stream of particles of one type has a velocity distribution with its peak well separated from that of another type of particle through which it is flowing. A stream of energetic electrons passing through a cold plasma can, for example: excite ion waves which will grow rapidly in magnitude at the expense of the kinetic energy of the electrons. (09 Oct 1997) |